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- The Eight Queens problem. Put eight queens on the board such that no one attacks another. Author: Hans L. Bodlaender.
- Exclusive Chess. Mate is only allowed if there is a unique way to do so. Author: Hans L. Bodlaender. Inventor: Theodor Steubel.
2 'Problem' entries listed 2 'Solitaire game, puzzle or chess problem' entries listed
Total items listed: 2